准噶尔盆地五彩湾凹陷基底火山岩储集性能及影响因素

Translated title of the contribution: Reservoir properties and effect factors on volcanic rocks of basement beneath Wucaiwan Depression, Junggar Basin

Chun Mei Yu*, Jian Ping Zheng, Yong Tang, Zhao Yang, Xue Feng Qi

*Corresponding author for this work

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The researches on oil- and gas- bearing volcanic rocks have largely developed the foreground of oil exploration. Types, facies distribution and physical properties (mainly porosity and permeability) of volcanic rock of the basement beneath the Wucaiwan depression, the eastern part of Junggar basin, are studied, based on the data of petrography and FMI. Oil- and gas-bearing volcanic rocks in this area belong to the Bashan group (C2b). The rocks are mainly lava (including andesites and basalts) and pyroclastic ones. The average porosity and permeability are 7.42% and 0.82 × 10-3 μm2 in lavas, and are 9.84% and 0.33 × 10-3 μm2 in volcanic breccias respectively. The reservoir-spaces of the rocks are mainly composed of secondary pores and fissures. The reservoir property in the Wucaiwan area is slightly poorer than that of the basement beneath the Shixi oilfield, the center part of the basin, where there is the best reservoir property in volcanic rocks. The environment during the volcanic eruption, types and facies of the rocks, and subsequent modification play important roles on the reservoir properties of the basement rocks.

Original languageChinese
Pages (from-to)303-308
Number of pages6
JournalDiqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences
Volume29
Issue number3
Publication statusPublished - May 2004
Externally publishedYes

Keywords

  • Junggar basin
  • Paleo-buried hill in basement
  • Reservoir space
  • Volcanic rock

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